NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, all time — NPA 616
AT&T ENTERPRISES, LLC 35
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2016-05-09 616-649-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C GRAND RPDS MI
2014-09-12 616-202-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C GRAND RPDS MI
2014-05-13 616-253-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MOLINE MI
2014-04-07 616-288-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GRAND RPDS MI
2013-10-10 616-537-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LAKEODESSA MI
2013-01-28 616-677-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C MARNE MI
2012-11-14 616-383-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C SPARTA MI
2012-11-07 616-232-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C GREENVILLE MI
2012-11-07 616-439-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CEDAR SPG MI
2011-12-01 616-524-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C GRATTAN MI
2011-08-11 616-420-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ALTO MI
2011-08-11 616-557-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SAND LAKE MI
2011-08-11 616-675-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C CASNOVIA MI
2011-08-11 616-765-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C FREEPORT MI
2011-08-11 616-841-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C IONIA MI
2011-08-11 616-952-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C KENT CITY MI
2011-08-11 616-984-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C TRUFANT MI
2011-02-10 616-427-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C GRAND RPDS MI
2011-01-19 616-244-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BELDING MI
2011-01-19 616-378-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C JAMESTOWN MI
2011-01-19 616-504-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CLARKSVL MI
2011-01-19 616-577-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C SARANAC MI
2011-01-19 616-681-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C DORR MI
2010-03-04 616-258-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C GRAND RPDS MI
2009-01-13 616-805-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C GRAND RPDS MI
2006-11-14 616-884-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C ROCKFORD MI
2006-11-07 616-682-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C ADA MI
2006-11-07 616-987-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LOWELL MI
2006-11-03 616-277-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C BYRON CTR MI
2006-11-03 616-536-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C CALEDONIA MI
2006-06-12 616-797-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C HUDSONVL MI
2006-03-10 616-607-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C GRANDHAVEN MI
2006-03-10 616-848-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C HOLLAND MI
2006-03-09 616-541-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C DUTTON MI
2005-12-12 616-931-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ZEELAND MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.